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audk/MdeModulePkg/Universal/Network/Udp4Dxe/Udp4Main.c

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/** @file
Copyright (c) 2006 - 2007, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
Udp4Main.c
Abstract:
**/
#include "Udp4Impl.h"
#include <Protocol/Ip4.h>
EFI_UDP4_PROTOCOL mUdp4Protocol = {
Udp4GetModeData,
Udp4Configure,
Udp4Groups,
Udp4Routes,
Udp4Transmit,
Udp4Receive,
Udp4Cancel,
Udp4Poll
};
/**
This function copies the current operational settings of this EFI UDPv4 Protocol
instance into user-supplied buffers. This function is used optionally to retrieve
the operational mode data of underlying networks or drivers.
@param This Pointer to the EFI_UDP4_PROTOCOL instance.
@param Udp4ConfigData Pointer to the buffer to receive the current
configuration data.
@param Ip4ModeData Pointer to the EFI IPv4 Protocol mode data
structure.
@param MnpConfigData Pointer to the managed network configuration data
structure.
@param SnpModeData Pointer to the simple network mode data structure.
@retval EFI_SUCCESS The mode data was read.
@retval EFI_NOT_STARTED When Udp4ConfigData is queried, no configuration
data is available because this instance has not
been started.
@retval EFI_INVALID_PARAMETER This is NULL.
**/
EFI_STATUS
EFIAPI
Udp4GetModeData (
IN EFI_UDP4_PROTOCOL *This,
OUT EFI_UDP4_CONFIG_DATA *Udp4ConfigData OPTIONAL,
OUT EFI_IP4_MODE_DATA *Ip4ModeData OPTIONAL,
OUT EFI_MANAGED_NETWORK_CONFIG_DATA *MnpConfigData OPTIONAL,
OUT EFI_SIMPLE_NETWORK_MODE *SnpModeData OPTIONAL
)
{
UDP4_INSTANCE_DATA *Instance;
EFI_IP4_PROTOCOL *Ip;
EFI_TPL OldTpl;
EFI_STATUS Status;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = UDP4_INSTANCE_DATA_FROM_THIS (This);
if (!Instance->Configured && (Udp4ConfigData != NULL)) {
return EFI_NOT_STARTED;
}
OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);
if (Udp4ConfigData != NULL) {
//
// Set the Udp4ConfigData.
//
*Udp4ConfigData = Instance->ConfigData;
}
Ip = Instance->IpInfo->Ip;
//
// Get the underlying Ip4ModeData, MnpConfigData and SnpModeData.
//
Status = Ip->GetModeData (Ip, Ip4ModeData, MnpConfigData, SnpModeData);
NET_RESTORE_TPL (OldTpl);
return Status;
}
/**
This function is used to do the following:
Initialize and start this instance of the EFI UDPv4 Protocol.
Change the filtering rules and operational parameters.
Reset this instance of the EFI UDPv4 Protocol.
@param This Pointer to the EFI_UDP4_PROTOCOL instance.
@param UdpConfigData Pointer to the buffer to receive the current mode
data.
@retval EFI_SUCCESS The configuration settings were set, changed, or
reset successfully.
@retval EFI_NO_MAPPING When using a default address, configuration (DHCP,
BOOTP, RARP, etc.) is not finished yet.
@retval EFI_INVALID_PARAMETER One or more following conditions are TRUE: This is
NULL. UdpConfigData.StationAddress is not a valid
unicast IPv4 address. UdpConfigData.SubnetMask is
not a valid IPv4 address mask.
UdpConfigData.RemoteAddress is not a valid unicast
IPv4 address if it is not zero.
@retval EFI_ALREADY_STARTED The EFI UDPv4 Protocol instance is already
started/configured and must be stopped/reset
before it can be reconfigured. Only TypeOfService,
TimeToLive, DoNotFragment, ReceiveTimeout, and
TransmitTimeout can be reconfigured without
stopping the current instance of the EFI UDPv4
Protocol.
@retval EFI_ACCESS_DENIED UdpConfigData.AllowDuplicatePort is FALSE and
UdpConfigData.StationPort is already used by other
instance.
@retval EFI_OUT_OF_RESOURCES The EFI UDPv4 Protocol driver cannot allocate
memory for this EFI UDPv4 Protocol instance.
@retval EFI_DEVICE_ERROR An unexpected network or system error occurred and
this instance was not opened.
**/
EFI_STATUS
EFIAPI
Udp4Configure (
IN EFI_UDP4_PROTOCOL *This,
IN EFI_UDP4_CONFIG_DATA *UdpConfigData OPTIONAL
)
{
EFI_STATUS Status;
UDP4_INSTANCE_DATA *Instance;
UDP4_SERVICE_DATA *Udp4Service;
EFI_TPL OldTpl;
IP4_ADDR StationAddress;
IP4_ADDR SubnetMask;
IP4_ADDR RemoteAddress;
EFI_IP4_CONFIG_DATA Ip4ConfigData;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = UDP4_INSTANCE_DATA_FROM_THIS (This);
if (!Instance->Configured && (UdpConfigData == NULL)) {
return EFI_SUCCESS;
}
Udp4Service = Instance->Udp4Service;
Status = EFI_SUCCESS;
OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);
if (UdpConfigData != NULL) {
StationAddress = EFI_NTOHL (UdpConfigData->StationAddress);
SubnetMask = EFI_NTOHL (UdpConfigData->SubnetMask);
RemoteAddress = EFI_NTOHL (UdpConfigData->RemoteAddress);
if (!UdpConfigData->UseDefaultAddress &&
(!IP4_IS_VALID_NETMASK (SubnetMask) ||
!((StationAddress == 0) || Ip4IsUnicast (StationAddress, SubnetMask)) ||
!((RemoteAddress == 0) || Ip4IsUnicast (RemoteAddress, 0)))) {
//
// Don't use default address, and subnet mask is invalid or StationAddress is not
// a valid unicast IPv4 address or RemoteAddress is not a valid unicast IPv4 address
// if it is not 0.
//
Status = EFI_INVALID_PARAMETER;
goto ON_EXIT;
}
if (Instance->Configured) {
//
// The instance is already configured, try to do the re-configuration.
//
if (!Udp4IsReconfigurable (&Instance->ConfigData, UdpConfigData)) {
//
// If the new configuration data wants to change some unreconfigurable
// settings, return EFI_ALREADY_STARTED.
//
Status = EFI_ALREADY_STARTED;
goto ON_EXIT;
}
//
// Save the reconfigurable parameters.
//
Instance->ConfigData.TypeOfService = UdpConfigData->TypeOfService;
Instance->ConfigData.TimeToLive = UdpConfigData->TimeToLive;
Instance->ConfigData.DoNotFragment = UdpConfigData->DoNotFragment;
Instance->ConfigData.ReceiveTimeout = UdpConfigData->ReceiveTimeout;
Instance->ConfigData.TransmitTimeout = UdpConfigData->TransmitTimeout;
} else {
//
// Construct the Ip configuration data from the UdpConfigData.
//
Udp4BuildIp4ConfigData (UdpConfigData, &Ip4ConfigData);
//
// Configure the Ip instance wrapped in the IpInfo.
//
Status = IpIoConfigIp (Instance->IpInfo, &Ip4ConfigData);
if (EFI_ERROR (Status)) {
if (Status == EFI_NO_MAPPING) {
Instance->IsNoMapping = TRUE;
}
goto ON_EXIT;
}
Instance->IsNoMapping = FALSE;
//
// Save the configuration data.
//
Instance->ConfigData = *UdpConfigData;
Instance->ConfigData.StationAddress = Ip4ConfigData.StationAddress;
Instance->ConfigData.SubnetMask = Ip4ConfigData.SubnetMask;
//
// Try to allocate the required port resource.
//
Status = Udp4Bind (&Udp4Service->ChildrenList, &Instance->ConfigData);
if (EFI_ERROR (Status)) {
//
// Reset the ip instance if bind fails.
//
IpIoConfigIp (Instance->IpInfo, NULL);
goto ON_EXIT;
}
//
// Pre calculate the checksum for the pseudo head, ignore the UDP length first.
//
Instance->HeadSum = NetPseudoHeadChecksum (
EFI_IP4 (Instance->ConfigData.StationAddress),
EFI_IP4 (Instance->ConfigData.RemoteAddress),
EFI_IP_PROTO_UDP,
0
);
Instance->Configured = TRUE;
}
} else {
//
// UdpConfigData is NULL, reset the instance.
//
Instance->Configured = FALSE;
Instance->IsNoMapping = FALSE;
//
// Reset the Ip instance wrapped in the IpInfo.
//
IpIoConfigIp (Instance->IpInfo, NULL);
//
// Cancel all the user tokens.
//
Udp4InstanceCancelToken (Instance, NULL);
//
// Remove the buffered RxData for this instance.
//
Udp4FlushRxData (&Instance->RcvdDgramQue);
}
Udp4SetVariableData (Instance->Udp4Service);
ON_EXIT:
NET_RESTORE_TPL (OldTpl);
return Status;
}
/**
This function is used to enable and disable the multicast group filtering.
@param This Pointer to the EFI_UDP4_PROTOCOL instance.
@param JoinFlag Set to TRUE to join a multicast group. Set to
FALSE to leave one or all multicast groups.
@param MulticastAddress Pointer to multicast group address to join or
leave.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_NOT_STARTED The EFI UDPv4 Protocol instance has not been
started.
@retval EFI_NO_MAPPING When using a default address, configuration (DHCP,
BOOTP, RARP, etc.) is not finished yet.
@retval EFI_OUT_OF_RESOURCES Could not allocate resources to join the group.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
This is NULL. JoinFlag is TRUE and
MulticastAddress is NULL. JoinFlag is TRUE and
*MulticastAddress is not a valid multicast
address.
@retval EFI_ALREADY_STARTED The group address is already in the group table
(when JoinFlag is TRUE).
@retval EFI_NOT_FOUND The group address is not in the group table (when
JoinFlag is FALSE).
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
**/
EFI_STATUS
EFIAPI
Udp4Groups (
IN EFI_UDP4_PROTOCOL *This,
IN BOOLEAN JoinFlag,
IN EFI_IPv4_ADDRESS *MulticastAddress OPTIONAL
)
{
EFI_STATUS Status;
UDP4_INSTANCE_DATA *Instance;
EFI_IP4_PROTOCOL *Ip;
EFI_TPL OldTpl;
if ((This == NULL) ||
(JoinFlag && (MulticastAddress == NULL)) ||
(JoinFlag && !IP4_IS_MULTICAST (EFI_NTOHL (*MulticastAddress)))) {
return EFI_INVALID_PARAMETER;
}
Instance = UDP4_INSTANCE_DATA_FROM_THIS (This);
if (Instance->IsNoMapping) {
return EFI_NO_MAPPING;
}
if (!Instance->Configured) {
return EFI_NOT_STARTED;
}
Ip = Instance->IpInfo->Ip;
OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);
//
// Invoke the Ip instance the Udp4 instance consumes to do the group operation.
//
Status = Ip->Groups (Ip, JoinFlag, MulticastAddress);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
//
// Keep a local copy of the configured multicast IPs because IpIo receives
// datagrams from the 0 station address IP instance and then UDP delivers to
// the matched instance. This copy of multicast IPs is used to avoid receive
// the mutlicast datagrams destinated to multicast IPs the other instances configured.
//
if (JoinFlag) {
NetMapInsertTail (
&Instance->McastIps,
(VOID *) (UINTN) EFI_IP4 (*MulticastAddress),
NULL
);
} else {
NetMapIterate (&Instance->McastIps, Udp4LeaveGroup, MulticastAddress);
}
ON_EXIT:
NET_RESTORE_TPL (OldTpl);
return Status;
}
/**
This function adds a route to or deletes a route from the routing table.
@param This Pointer to the EFI_UDP4_PROTOCOL instance.
@param DeleteRoute Set to TRUE to delete this route from the routing
table. Set to FALSE to add this route to the
routing table.
@param SubnetAddress The destination network address that needs to be
routed.
@param SubnetMask The subnet mask of SubnetAddress.
@param GatewayAddress The gateway IP address for this route.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_NOT_STARTED The EFI UDPv4 Protocol instance has not been
started.
@retval EFI_NO_MAPPING When using a default address, configuration (DHCP,
BOOTP, RARP, etc.) is not finished yet.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
This is NULL. SubnetAddress is NULL. SubnetMask is
NULL. GatewayAddress is NULL. SubnetAddress is not
a valid subnet address. SubnetMask is not a valid
subnet mask. GatewayAddress is not a valid unicast
IP address.
@retval EFI_OUT_OF_RESOURCES Could not add the entry to the routing table.
@retval EFI_NOT_FOUND This route is not in the routing table.
@retval EFI_ACCESS_DENIED The route is already defined in the routing table.
**/
EFI_STATUS
EFIAPI
Udp4Routes (
IN EFI_UDP4_PROTOCOL *This,
IN BOOLEAN DeleteRoute,
IN EFI_IPv4_ADDRESS *SubnetAddress,
IN EFI_IPv4_ADDRESS *SubnetMask,
IN EFI_IPv4_ADDRESS *GatewayAddress
)
{
UDP4_INSTANCE_DATA *Instance;
EFI_IP4_PROTOCOL *Ip;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = UDP4_INSTANCE_DATA_FROM_THIS (This);
if (Instance->IsNoMapping) {
return EFI_NO_MAPPING;
}
if (!Instance->Configured) {
return EFI_NOT_STARTED;
}
Ip = Instance->IpInfo->Ip;
//
// Invoke the Ip instance the Udp4 instance consumes to do the actual operation.
//
return Ip->Routes (Ip, DeleteRoute, SubnetAddress, SubnetMask, GatewayAddress);
}
/**
This function places a sending request to this instance of the EFI UDPv4 Protocol,
alongside the transmit data that was filled by the user.
@param This Pointer to the EFI_UDP4_PROTOCOL instance.
@param Token Pointer to the completion token that will be
placed into the transmit queue.
@retval EFI_SUCCESS The data has been queued for transmission.
@retval EFI_NOT_STARTED This EFI UDPv4 Protocol instance has not been
started.
@retval EFI_NO_MAPPING When using a default address, configuration (DHCP,
BOOTP, RARP, etc.) is not finished yet.
@retval EFI_INVALID_PARAMETER One or more of the following are TRUE: This is
NULL. Token is NULL. Token.Event is NULL.
Token.Packet.TxData is NULL.
Token.Packet.TxData.FragmentCount is zero.
Token.Packet.TxData.DataLength is not equal to the
sum of fragment lengths. One or more of the
Token.Packet.TxData.FragmentTable[].
FragmentLength fields is zero. One or more of the
Token.Packet.TxData.FragmentTable[].
FragmentBuffer fields is NULL.
Token.Packet.TxData. GatewayAddress is not a
unicast IPv4 address if it is not NULL. One or
more IPv4 addresses in Token.Packet.TxData.
UdpSessionData are not valid unicast IPv4
addresses if the UdpSessionData is not NULL.
@retval EFI_ACCESS_DENIED The transmit completion token with the same
Token.Event is already in the transmit queue.
@retval EFI_NOT_READY The completion token could not be queued because
the transmit queue is full.
@retval EFI_OUT_OF_RESOURCES Could not queue the transmit data.
@retval EFI_NOT_FOUND There is no route to the destination network or
address.
@retval EFI_BAD_BUFFER_SIZE The data length is greater than the maximum UDP
packet size. Or the length of the IP header + UDP
header + data length is greater than MTU if
DoNotFragment is TRUE.
**/
EFI_STATUS
EFIAPI
Udp4Transmit (
IN EFI_UDP4_PROTOCOL *This,
IN EFI_UDP4_COMPLETION_TOKEN *Token
)
{
EFI_STATUS Status;
UDP4_INSTANCE_DATA *Instance;
EFI_TPL OldTpl;
NET_BUF *Packet;
EFI_UDP4_HEADER *Udp4Header;
EFI_UDP4_CONFIG_DATA *ConfigData;
IP4_ADDR Destination;
EFI_UDP4_TRANSMIT_DATA *TxData;
EFI_UDP4_SESSION_DATA *UdpSessionData;
UDP4_SERVICE_DATA *Udp4Service;
IP_IO_OVERRIDE Override;
UINT16 HeadSum;
if ((This == NULL) || (Token == NULL)) {
return EFI_INVALID_PARAMETER;
}
Instance = UDP4_INSTANCE_DATA_FROM_THIS (This);
if (Instance->IsNoMapping) {
return EFI_NO_MAPPING;
}
if (!Instance->Configured) {
return EFI_NOT_STARTED;
}
OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);
//
// Validate the Token, if the token is invalid return the error code.
//
Status = Udp4ValidateTxToken (Instance, Token);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
if (EFI_ERROR (NetMapIterate (&Instance->TxTokens, Udp4TokenExist, Token)) ||
EFI_ERROR (NetMapIterate (&Instance->RxTokens, Udp4TokenExist, Token))) {
//
// Try to find a duplicate token in the two token maps, if found, return
// EFI_ACCESS_DENIED.
//
Status = EFI_ACCESS_DENIED;
goto ON_EXIT;
}
TxData = Token->Packet.TxData;
//
// Create a net buffer to hold the user buffer and the udp header.
//
Packet = NetbufFromExt (
(NET_FRAGMENT *)TxData->FragmentTable,
TxData->FragmentCount,
UDP4_HEADER_SIZE,
0,
Udp4NetVectorExtFree,
NULL
);
if (Packet == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
//
// Store the IpIo in ProtoData.
//
Udp4Service = Instance->Udp4Service;
*((UINTN *) &Packet->ProtoData[0]) = (UINTN) (Udp4Service->IpIo);
Udp4Header = (EFI_UDP4_HEADER *) NetbufAllocSpace (Packet, UDP4_HEADER_SIZE, TRUE);
ConfigData = &Instance->ConfigData;
//
// Fill the udp header.
//
Udp4Header->SrcPort = HTONS (ConfigData->StationPort);
Udp4Header->DstPort = HTONS (ConfigData->RemotePort);
Udp4Header->Length = HTONS (Packet->TotalSize);
Udp4Header->Checksum = 0;
UdpSessionData = TxData->UdpSessionData;
Override.SourceAddress = ConfigData->StationAddress;
if (UdpSessionData != NULL) {
//
// Set the SourceAddress, SrcPort and Destination according to the specified
// UdpSessionData.
//
if (EFI_IP4 (UdpSessionData->SourceAddress) != 0) {
Override.SourceAddress = UdpSessionData->SourceAddress;
}
if (UdpSessionData->SourcePort != 0) {
Udp4Header->SrcPort = HTONS (UdpSessionData->SourcePort);
}
Destination = EFI_IP4 (UdpSessionData->DestinationAddress);
if (UdpSessionData->DestinationPort != 0) {
Udp4Header->DstPort = HTONS (UdpSessionData->DestinationPort);
}
//
// calculate the pseudo head checksum using the overridden parameters.
//
HeadSum = NetPseudoHeadChecksum (
EFI_IP4 (Override.SourceAddress),
Destination,
EFI_IP_PROTO_UDP,
0
);
} else {
//
// UdpSessionData is NULL, use the address and port information previously configured.
//
Destination = EFI_IP4 (ConfigData->RemoteAddress);
HeadSum = Instance->HeadSum;
}
//
// calculate the checksum.
//
Udp4Header->Checksum = Udp4Checksum (Packet, HeadSum);
if (Udp4Header->Checksum == 0) {
//
// If the calculated checksum is 0, fill the Checksum field with all ones.
//
Udp4Header->Checksum = 0xffff;
}
//
// Fill the IpIo Override data.
//
EFI_IP4 (Override.GatewayAddress) = (TxData->GatewayAddress != NULL) ?
EFI_IP4 (*(TxData->GatewayAddress)) : 0;
Override.Protocol = EFI_IP_PROTO_UDP;
Override.TypeOfService = ConfigData->TypeOfService;
Override.TimeToLive = ConfigData->TimeToLive;
Override.DoNotFragment = ConfigData->DoNotFragment;
//
// Save the token into the TxToken map.
//
Status = NetMapInsertTail (&Instance->TxTokens, Token, Packet);
if (EFI_ERROR (Status)) {
goto FREE_PACKET;
}
//
// Send out this datagram through IpIo.
//
Status = IpIoSend (
Udp4Service->IpIo,
Packet,
Instance->IpInfo,
Instance,
Token,
Destination,
&Override
);
if (EFI_ERROR (Status)) {
//
// Remove this token from the TxTokens.
//
Udp4RemoveToken (&Instance->TxTokens, Token);
}
FREE_PACKET:
NetbufFree (Packet);
ON_EXIT:
NET_RESTORE_TPL (OldTpl);
return Status;
}
/**
This function places a completion token into the receive packet queue. This function
is always asynchronous.
@param This Pointer to the EFI_UDP4_PROTOCOL instance.
@param Token Pointer to a token that is associated with the
receive data descriptor.
@retval EFI_SUCCESS The receive completion token is cached.
@retval EFI_NOT_STARTED This EFI UDPv4 Protocol instance has not been
started.
@retval EFI_NO_MAPPING When using a default address, configuration (DHCP,
BOOTP, RARP, etc.) is not finished yet.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
This is NULL. Token is NULL. Token.Event is NULL.
@retval EFI_OUT_OF_RESOURCES The receive completion token could not be queued
due to a lack of system resources (usually
memory).
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
The EFI UDPv4 Protocol instance has been reset to
startup defaults.
@retval EFI_ACCESS_DENIED A receive completion token with the same
Token.Event is already in the receive queue.
@retval EFI_NOT_READY The receive request could not be queued because
the receive queue is full.
**/
EFI_STATUS
EFIAPI
Udp4Receive (
IN EFI_UDP4_PROTOCOL *This,
IN EFI_UDP4_COMPLETION_TOKEN *Token
)
{
EFI_STATUS Status;
UDP4_INSTANCE_DATA *Instance;
EFI_TPL OldTpl;
if ((This == NULL) || (Token == NULL) || (Token->Event == NULL)) {
return EFI_INVALID_PARAMETER;
}
Instance = UDP4_INSTANCE_DATA_FROM_THIS (This);
if (Instance->IsNoMapping) {
return EFI_NO_MAPPING;
}
if (!Instance->Configured) {
return EFI_NOT_STARTED;
}
OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);
if (EFI_ERROR (NetMapIterate (&Instance->RxTokens, Udp4TokenExist, Token))||
EFI_ERROR (NetMapIterate (&Instance->TxTokens, Udp4TokenExist, Token))) {
//
// Return EFI_ACCESS_DENIED if the specified token is already in the TxTokens or
// RxTokens map.
//
Status = EFI_ACCESS_DENIED;
goto ON_EXIT;
}
Token->Packet.RxData = NULL;
//
// Save the token into the RxTokens map.
//
Status = NetMapInsertTail (&Instance->RxTokens, Token, NULL);
if (EFI_ERROR (Status)) {
return EFI_NOT_READY;
}
//
// If there is an icmp error, report it.
//
Udp4ReportIcmpError (Instance);
//
// Try to delivered the received datagrams.
//
Udp4InstanceDeliverDgram (Instance);
ON_EXIT:
NET_RESTORE_TPL (OldTpl);
return Status;
}
/**
This function is used to abort a pending transmit or receive request.
@param This Pointer to the EFI_UDP4_PROTOCOL instance.
@param Token Pointer to a token that has been issued by
EFI_UDP4_PROTOCOL.Transmit() or
EFI_UDP4_PROTOCOL.Receive().
@retval EFI_SUCCESS The asynchronous I/O request is aborted and
Token.Event is signaled. When Token is NULL, all
pending requests are aborted and their events are
signaled.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_NOT_STARTED This instance has not been started.
@retval EFI_NO_MAPPING When using the default address, configuration
(DHCP, BOOTP, RARP, etc.) is not finished yet.
@retval EFI_NOT_FOUND When Token is not NULL, the asynchronous I/O
request is not found in the transmit or receive
queue. It is either completed or not issued by
Transmit() or Receive().
**/
EFI_STATUS
EFIAPI
Udp4Cancel (
IN EFI_UDP4_PROTOCOL *This,
IN EFI_UDP4_COMPLETION_TOKEN *Token OPTIONAL
)
{
EFI_STATUS Status;
UDP4_INSTANCE_DATA *Instance;
EFI_TPL OldTpl;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = UDP4_INSTANCE_DATA_FROM_THIS (This);
if (Instance->IsNoMapping) {
return EFI_NO_MAPPING;
}
if (!Instance->Configured) {
return EFI_NOT_STARTED;
}
OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);
//
// Cancle the tokens specified by Token for this instance.
//
Status = Udp4InstanceCancelToken (Instance, Token);
NET_RESTORE_TPL (OldTpl);
return Status;
}
/**
This function can be used by network drivers and applications to increase the rate that
data packets are moved between the communications device and the transmit/receive queues.
Argumens:
This - Pointer to the EFI_UDP4_PROTOCOL instance.
@retval EFI_SUCCESS Incoming or outgoing data was processed.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
@retval EFI_TIMEOUT Data was dropped out of the transmit and/or
receive queue.
**/
EFI_STATUS
EFIAPI
Udp4Poll (
IN EFI_UDP4_PROTOCOL *This
)
{
UDP4_INSTANCE_DATA *Instance;
EFI_IP4_PROTOCOL *Ip;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = UDP4_INSTANCE_DATA_FROM_THIS (This);
Ip = Instance->IpInfo->Ip;
//
// Invode the Ip instance consumed by the udp instance to do the poll operation.
//
return Ip->Poll (Ip);
}
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